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McDonnell Douglas KC-10 Extender
McDonnell Douglas KC-10 Extender
McDonnell Douglas KC-10 Extender
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The McDonnell Douglas KC-10 Extender is an American tanker and cargo aircraft that was operated by the United States Air Force (USAF) from 1981 to 2024. A military version of the three-engine DC-10 airliner, the KC-10 was developed from the Advanced Tanker Cargo Aircraft Program.[N 1] It incorporates military-specific equipment for its primary roles of aerial refueling and transport. It was developed to supplement the KC-135 Stratotanker following experiences in Southeast Asia and the Middle East. The KC-10 was the second McDonnell Douglas transport aircraft to be selected by the Air Force following the C-9. A total of 60 KC-10s were produced for the USAF. The Royal Netherlands Air Force operated two similar tankers from 1995 to 2021 designated KDC-10 that were converted from used civilian DC-10, instead of purpose built aircraft.[3]

Key Information

The KC-10 played a key role in the mobilization of US military assets, taking part in overseas operations far from home. These aircraft performed airlift and aerial refueling during the 1986 bombing of Libya (Operation Eldorado Canyon), the 1990–91 Gulf War with Iraq (Operations Desert Shield and Desert Storm), the NATO bombing of Yugoslavia (Operation Allied Force), the War in Afghanistan (Operation Enduring Freedom), and the Iraq War (Operations Iraqi Freedom and New Dawn).

Design and development

[edit]

Advanced Tanker Cargo Aircraft Program

[edit]
An early KC-10 Extender aircraft refuels a C-5 Galaxy in 1980. Both aircraft are wearing liveries typical of that era.

During the Vietnam War, doubts began to form regarding the Boeing KC-135 Stratotanker fleet's ability to meet the needs of the United States' global commitments. The aerial refueling fleet was deployed to Southeast Asia to support tactical aircraft and strategic bombers, while maintaining the U.S.-based support of the nuclear-bomber fleet. Consequently, the Air Force sought an aerial tanker with greater capabilities than the KC-135. In 1972, two DC-10s were flown in trials at Edwards Air Force Base, simulating air refuelings to check for possible wake issues. Boeing performed similar tests with a 747.[4]

During the 1973 Yom Kippur War, the Air Force commenced Operation Nickel Grass to supply Israel with weapons and supplies. The operation demonstrated the necessity for adequate air-refueling capabilities; denied landing rights in Europe, C-5 Galaxy transports were forced to carry a fraction of their maximum payload on direct flights from the continental United States to Israel.[5][6] To address this shortfall in mobility, in 1975, under the Advanced Tanker Cargo Aircraft Program, three aircraft were evaluated—the Boeing 747, Lockheed C-5 and McDonnell Douglas DC-10.[7] In December 1977, the DC-10 was chosen, primarily for its ability to operate from shorter runways.[6] Initially, 12 aircraft were ordered, but this was later increased to 60.[6]

KC-10 Extender

[edit]

The KC-10 Extender first flew in July 1980. In October 1980 the first aerial refuel sortie was performed.[8][9] The KC-10 is largely based on the design of the civilian DC-10-30CF, a convertible cargo/passenger transport variant with an extended range compared to the baseline DC-10-10. For the KC-10, unnecessary features including most windows and lower cargo doors were removed, an improved cargo-handling system was added and the avionics were tailored to the military's needs.[10][11] The KC-10 retained an 88% commonality with its civilian counterparts, giving it greater access to the worldwide commercial support system.[6]

Early aircraft featured a distinctive light gray and white paint scheme typical of that era. A gray-green camouflage scheme was used on later tankers. The paint scheme was switched to the Air Force standard gray color by the late 1990s.[12]

The KC-10's refueling boom operator cockpit is seated rather than prone.
The KC-10's refueling boom operator is seated rather than prone

The most notable changes were the addition of the McDonnell Douglas Advanced Aerial Refueling Boom and additional fuel tanks located in the baggage compartments below the main deck. The extra tanks increase the KC-10's fuel capacity to 356,000 pounds (161,000 kg), nearly double the KC-135's capacity.[8] The KC-10 has both a centerline refueling boom—unique in that it sports a control surface system at its aft end that differs from the V-tail design used on previous tankers—and a drogue-and-hose system on the starboard side of the rear fuselage. The KC-10 boom operator cockpit is seated in the rear of the aircraft with a wide window for monitoring refueling rather than prone as in the KC-135. The operator controls refueling operations through a digital fly-by wire system.[12][13] The refueling boom can deliver fuel to a receiver at the maximum rate of 1,100 U.S. gallons (4,200 liters) per minute, while the centerline drogue system has a maximum fuel offload rate of 470 U.S. gallons (1,800 liters) per minute.[14]

A jet aircraft refuels from a gray three-engine tanker via a long boom located under the tanker's aft fuselage.
The KC-10's mixed refueling system of hose-and-drogue and flying-boom allows it to refuel the aircraft of the U.S. Air Force, U.S. Navy, U.S. Marine Corps and allied forces.[8]

Unlike the KC-135, the KC-10's hose-and-drogue system allows refueling of Navy, Marine Corps, and most allied aircraft, all in one mission.[8] The final twenty KC-10s produced included wing-mounted hose-and-drogue pods for added refueling locations.[4] The KC-10 can carry a complement of 75 personnel with 146,000 pounds (66,000 kg) of cargo, or 170,000 pounds (77,000 kg) in an all-cargo configuration.[8] With that, it can transport those weights for an unrefueled range of 4,400 miles (7,100 km).[14] The KC-10 has a large door located just behind the flight deck for loading and unloading cargo. Handling equipment is required to raise and lower loads to the cargo opening. The aircraft can still perform aerial refueling while carrying cargo.[15]

Further developments

[edit]

A need for new transport aircraft for the Royal Netherlands Air Force (Koninklijke Luchtmacht) was first identified in 1984.[2] The 1991 Gulf War highlighted the deficiencies in mobility of European forces.[16] In 1991, four categories of transport requirements were established. Category A required a large cargo aircraft with a range of at least 4,500 km and the capability to refuel F-16s. In 1992, two DC-10-30CFs were acquired from Martinair in a buy/leaseback contract. When one of the two aircraft was lost in the Martinair Flight 495 crash, a third aircraft was bought from Martinair.[2]

The conversion was handled via the United States foreign military sales program, which contracted McDonnell Douglas. Costs for the conversion were initially estimated at $89.5 million (FY 1994). The aircraft were to be equipped with both a boom and a probe and drogue system. Because McDonnell Douglas did not have any experience with the requested Remote Aerial Refueling Operator (RARO) system, and because the third aircraft differed from the original two, the program could not be completed at budget. By omitting the probe and drogue system and a fixed partition wall between the cargo and passenger, the cost could be limited at $96 million.[2]

To make up for the cost increase McDonnell Douglas hired Dutch companies to do part of the work. The conversion of the aircraft was performed by KLM and was done from October 1994 to September 1995 for the first aircraft and from February to December 1995 for the second. This was much longer than planned, mostly because McDonnell Douglas delivered the parts late. This would have again increased the cost, but in the contract for the AH-64 Apaches which the Royal Netherlands Air Force also bought from McDonnell Douglas, the price was agreed to be kept at $96 million.[2]

In 2010, the USAF awarded a contract to Boeing to upgrade the fleet of 59 aircraft with new Communication, navigation and surveillance and air traffic management (CNS/ATM) system. This was to allow the aircraft to fly in civil airspace as new ICAO and FAA standards took effect in 2015.[17] Rockwell Collins was awarded a contract in 2011 for avionics and systems integration for the cockpit modernization program.[18][19]

Operational history

[edit]

United States

[edit]

The first KC-10 was delivered to the Air Force's Strategic Air Command (SAC) in March 1981 at Barksdale AFB. In 1982 a newly renamed 22d Air Refueling Wing, formerly the 22d Bombardment Wing, was re-equipped with KC-10A Extenders and became the second Air Force unit to operate the new tankers.[citation needed] The 60th and final KC-10 was delivered on 29 November 1988.[20] The KC-10s served with SAC until 1992, when they were reassigned to the newly established Air Mobility Command. In the aerial refueling role, the KC-10s have been operated largely in the strategic refueling of large number of tactical aircraft on ferry flights and the refueling of other strategic transport aircraft. Conversely, the KC-135 fleet has operated largely in the in-theater tactical role. There were 59 KC-10 Extenders in service with the USAF as of 2010.[15][17] The USAF's KC-10s were stationed primarily at Travis AFB, California, and McGuire AFB, now part of Joint Base McGuire-Dix-Lakehurst, in New Jersey.

A US Navy F-14D and two F/A-18Cs prepare to refuel from a KC-10 in 2005 over the Persian Gulf.

When faced with refusals of basing and overflight rights from continental European countries during Operation El Dorado Canyon, the U.S. was forced to use the UK-based F-111s in the 1986 air-strikes against Libya. The KC-10s and KC-135s allowed 29 F-111s, along with other Air Force and Navy aircraft, to reach their targets.[21] The KC-10 again played a key role during Operations Desert Shield and Desert Storm in 1991. KC-10s facilitated the deployment of tactical, strategic, and transport aircraft to Saudi Arabia. In the early stages of Operation Desert Shield, aerial refueling was key to the rapid airlift of materiel and forces. In addition to refueling airlift aircraft, the KC-10, along with the smaller KC-135, moved thousands of tons of cargo and thousands of troops in support of the massive buildup. The KC-10 and the KC-135 conducted about 51,700 separate refueling operations and delivered 125 million gallons (475 million liters) of fuel without missing a single scheduled rendezvous.[15]

A KC-10 Extender of Travis AFB approaching a second KC-10 for refuelling over the Pacific Ocean, 2017

Since then, the KC-10 had participated in other smaller conflicts. In March 1999, NATO launched Operation Allied Force against the government of Yugoslavia. The mobility portion of the operation began in February and was heavily dependent on tankers. By early May 1999, some 150 KC-10s and KC-135s deployed to Europe where they refueled bombers, fighters and support aircraft engaged in the conflict. The KC-10 flew 409 missions throughout the entire Allied Force campaign and continued support operations in Kosovo.[15] Since 11 September 2001, KC-10s had flown more than 350 missions guarding U.S. skies as a part of Operation Noble Eagle. During Operations Enduring Freedom and Iraqi Freedom, KC-10s flew more than 1,390 missions delivering critical air refueling support to numerous joint and Coalition receiver aircraft.[15] As of 2004, KC-10s were expected to serve until 2043.[22]

The Air Force considered retiring its fleet of KC-10 tankers in response to sequestration budget cuts as part of the service's FY 2015 budget. A "vertical chop" to divest all KC-10s was suggested because there are fewer KC-10s than KC-135s, having three different tanker models in service after the introduction of the KC-46 would be costly, and a "horizontal cut" across the refueling fleets would achieve small efficiencies.[23] Some believed retiring the KC-10 would not benefit the Air Force, given that it is equipped with both boom and hose-and-drogue refueling systems and the fleet's relatively young age.[24]

The last U.S. Air Force KC-10 takes off from Travis Air Force Base, California, 26 Sept. 2024.

At first, officials claimed that the initial focus on retiring the KC-10 in September 2013 was a "trial balloon" to call attention to Air Force operating cost issues. As of early 2013, the KC-10 had a per hour flying cost of $21,170 and a mission capable rate of 87 percent.[25] A FY 2015 budget plan did not include cuts to the KC-10.[26] In July 2020, the first US KC-10 to be retired, tail number 86-0036, was transferred to the 309th Aerospace Maintenance and Regeneration Group (AMARG) for storage at Davis-Monthan Air Force Base, Arizona.[27]

In July 2021, the 2d ARS was the first KC-10 squadron to start conversion to the KC-46.[28] In August 2021, the KC-10 took part in the largest non-combatant evacuation in support of Operation Allies refuge and contributing to the safe evacuation of more than 124,000 Afghan refugees.[29]

In January 2023, the USAF announced that all KC-10s are to be retired by 30 September 2024.[30] The KC-10 flew its last combat sortie for the USAF on 5 October 2023.[31] On 26 September 2024, the KC-10 flew its final sortie on tail number 79-1948 bound for the 309th Aerospace Maintenance and Regeneration Group (AMARG) at Davis-Monthan Air Force Base, Arizona.[32]

Netherlands

[edit]

The two Dutch KDC-10s were used for both refueling and transport.[33] They were stationed on Eindhoven Airport as part of the 334th Transport Squadron. Of the 5,500 hours flown in the first three years of use, the aircraft were used in their tanker role for 50% of the time. Besides being used by the air force and NATO allies, the KDC-10s were also used to support peacekeeping and humanitarian aid operations. Of the first three years, 32% of the flight hours were used for peacekeeping and humanitarian aid.[2]

The second Royal Netherlands Air Force KDC-10 with landing gear down

In this function, the aircraft was deployed to Kosovo to evacuate refugees, to the Caribbean and Central America to provide humanitarian aid after the hurricanes Luis, Georges and Mitch and to various countries in Africa and Asia to provide development aid. In 1998, the aircraft were used to evacuate Dutch citizens from Indonesia during the Fall of Suharto. Dutch KDC-10s operated out of Manas AFB in support of allied forces during Operation Enduring Freedom and in support of Allied Air Force over Iraq and Syria.

A third cargo-only DC-10, registered T-255 was acquired and served for three years before being withdrawn from service in April 2014 due to Dutch defense cuts and flown to Newquay Airport for scrapping.[34] The KDC-10s in Dutch service were replaced with the Airbus A330 MRTT.[35] The first aircraft, registered T-264/'Prins Bernhard' and due for a major service, was withdrawn from use in November 2019, prior to being transferred to its new owner, Omega Aerial Refueling Services, an American defense contractor.[36] The last KDC-10, registered T-235/'Jan Scheffer' remained in Dutch service until October 2021.[37] The aircraft left The Netherlands bound for service with Omega in October 2021.[38][35]

Civilian operators

[edit]
Omega's KDC-10 tanker in March 2009

Commercial refueling companies Omega Aerial Refueling Services and Global Airtanker Service operate three KDC-10 tankers, N974VV, N235UL and N264DE, for lease.[39][40] They were converted from DC-10s and provide probe and drogue refueling capabilities from wing pods similar to the KC-10.[41]

In June and July 2011, Omega Air's KDC-10 supported three Royal Australian Air Force's F/A-18 Hornets, en route to Red Flag – Alaska.[42]

In 2019, Omega agreed to purchase the Netherlands' two KDC-10s. One was received in November 2019,[36] and the second delivered in October 2021.[38][35]

Variants

[edit]
  • KC-10A: Initial military tanker version based on the DC-10-30CF.
  • KDC-10: Conversion of DC-10-30CF aircraft to tanker/transport configuration. While a FMS program run through McDonnell Douglas, conversion of two aircraft was carried out by KLM. Omega Aerial Refueling Services now operates both former RNLAF KDC-10-30 aircraft and 1 KDC-10-40.[citation needed]
  • KC-10B: After McDonnell Douglas did the KDC-10 conversion for the Royal Netherlands Air Force in 1992, they proposed a tanker/transport version of the MD-11CF which had the in-house designation KMD-11. MDC offered either conversion of second hand aircraft (KMD-11) or new build aircraft (KC-10B), the proposed KMD-11 offered 35,000 lb more cargo capacity and 8,400 lb more transferable fuel than the KC-10A. It was offered to the RNLAF and Royal Saudi Air Force (RSAF) in the 1990s and the Royal Australian Air Force (RAAF) in the early 2000s.[43]

Operators

[edit]
Large gray jet aircraft with three engines (two under the wings and one under the vertical stabilizer). The aircraft had just lifted off from runway, with landing gear fully extended.
A KC-10 from Travis AFB taking off from RAF Mildenhall

Former

[edit]
 United States
 Netherlands

Incidents

[edit]

On 17 September 1987, KC-10A serial number 82-0190 was undergoing maintenance on the ground at Barksdale AFB, Louisiana, and suffered an explosion and subsequent fire. The KC-10 was significantly damaged and written off. One member of the ground crew died in the fire.[46]

Aircraft on display

[edit]

Specifications (KC-10A)

[edit]

Data from USAF Fact sheet,[15] Steffen[50]

General characteristics

  • Crew: 4 (Aircraft Commander, copilot, flight engineer, and boom operator)
  • Capacity: 170,000 lb of cargo, 25 pallets and 16 passengers, or 17 pallets and 75 passengers[50]
  • Length: 181 ft 7 in (55.35 m)
  • Wingspan: 165 ft 4.5 in (50.406 m)
  • Height: 58 ft 1 in (17.70 m)
  • Wing area: 3,958 sq ft (367.7 m2)
  • Airfoil: root: DSMA-496/-521/-522; tip: DSMA-519/-520[51]
  • Empty weight: 241,027 lb (109,328 kg)
  • Gross weight: 590,000 lb (267,619 kg)
  • Max takeoff weight: 590,000 lb (267,619 kg)
  • Fuel capacity: 365,000 lb (165,561 kg)
  • Powerplant: 3 × General Electric F103 (GE CF6-50C2) turbofan engines, 52,500 lbf (234 kN) thrust each

Performance

  • Maximum speed: 538 mph (866 km/h, 468 kn)
  • Maximum speed: Mach 0.89
  • Range: 4,400 mi (7,100 km, 3,800 nmi) with a maximum passenger capacity; 3,800 nmi (7,038 km; 4,373 mi) with maximum cargo capacity.
  • Ferry range: 11,500 mi (18,500 km, 10,000 nmi)
  • Service ceiling: 42,000 ft (13,000 m)
  • Rate of climb: 6,870 ft/min (34.9 m/s)

See also

[edit]

Related development

Aircraft of comparable role, configuration, and era

Related lists

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

McDonnell Douglas KC-10 Extender

View on Grokipedia
from Grokipedia
The McDonnell Douglas KC-10 Extender is a derived from the DC-10 commercial airliner and configured for , strategic airlift, and missions within the . Introduced to enhance global mobility through superior fuel offload capacity and range compared to predecessors like the KC-135 Stratotanker, the KC-10 features advanced , a refueling boom, and the ability to simultaneously transport cargo or passengers while providing in-flight refueling support. It can carry up to 170,000 pounds (76,657 kilograms) of cargo or 75 passengers over 4,400 miles (7,081 kilometers) unrefueled, and offload up to 200,000 pounds (90,718 kilograms) of fuel using both rigid boom and hose-and-drogue systems compatible with diverse receiver aircraft. A total of 60 KC-10A aircraft were produced from 1979 to 1987, entering operational service in March 1981 after the prototype's first flight in July 1980, and forming squadrons under for deployments in major operations including the , , and . The platform's defining versatility as the sole tanker capable of combined refueling and heavy-lift roles on a single sortie underscored its strategic value, though sustainment costs and the arrival of the KC-46 Pegasus led to full fleet retirement by September 26, 2024.

Development

Advanced Tanker Cargo Aircraft Program

In the mid-1970s, the U.S. Air Force faced escalating demands for enhanced and strategic amid an aging fleet of KC-135 Stratotankers, originally produced between 1956 and 1964 and showing accelerated wear from intensive operations. The initiated the Advanced Tanker Cargo Aircraft (ATCA) program through Requirement Operational Capability (ROC) 15-73, issued on December 15, 1973, which specified an advanced multi-purpose tanker to supplement the KC-135's limitations in fuel capacity and range for long-duration missions. Formally established with the ATCA Program Office on , 1974, the initiative responded to empirical assessments of global power projection needs, including reduced forward basing post-Vietnam War and heightened requirements for sustained operations as evidenced by the 1973 , where tanker shortages constrained force extension. The program's core rationale centered on procuring a single aircraft type to perform simultaneous in-flight refueling and outsized cargo delivery, thereby alleviating logistical bottlenecks in deploying fighter squadrons and support elements over intercontinental distances without excessive reliance on vulnerable ground infrastructure. ATCA requirements prioritized a platform with substantially greater offload—targeting over 200,000 pounds transferable—extended unrefueled range exceeding 4,000 nautical miles with , and capacity for 75 passengers plus 160,000 pounds of on standard pallets, enabling one to replicate the functions of multiple KC-135s or C-141s in deployment scenarios. These specifications derived from operational analyses of post-Vietnam force structure, where proved essential for maintaining combat tempo but was hampered by the KC-135's modest 120,000-pound load and limited integration, leading to inefficiencies in rapid global response. The dual-role emphasis addressed causal gaps in theater sustainment, as tanker often idled during phases or vice versa, wasting capacity during crises requiring both fuel extension and prepositioning. To meet these needs, a request for proposals was released on August 27, 1976, inviting bids from , which proposed a militarized 747 variant with immense volume for fuel and cargo, and McDonnell Douglas, advocating a DC-10 optimized for . Evaluations focused on verifiable metrics like offload-to-takeoff weight ratios, deployment timelines for air wings, and lifecycle costs, revealing the DC-10's advantages in and adaptability despite the 747's superior gross capacity. On December 19, 1977, McDonnell Douglas secured the contract for an initial 20 aircraft, reflecting a determination that the selected design better aligned with priorities for versatile, cost-effective augmentation of existing fleets over a larger but less economical alternative. This outcome underscored procurement decisions grounded in operational realism rather than maximalism, prioritizing integrated mission effectiveness amid fiscal constraints.

Selection and Production

The U.S. Air Force released a formal request for proposals for the Advanced Tanker Cargo Aircraft program on August 27, 1976, initiating a competition among proposals from Boeing (a modified 747), Lockheed (variants of the C-5 or L-1011), and McDonnell Douglas (a militarized DC-10). On December 19, 1977, McDonnell Douglas was selected based on an integrated evaluation prioritizing capability, acquisition price, life-cycle costs, and technical features, with the DC-10 offering superior cost-effectiveness and operational versatility over the larger Boeing 747, including better suitability for shorter runways and the established reliability of its commercial airframe despite early cargo door incidents resolved by the mid-1970s. Congress approved initial funding in fiscal year 1978 for 20 KC-10A aircraft at an estimated program cost of $1.055 billion, with McDonnell Douglas receiving the development and production contract that year; subsequent congressional authorizations expanded procurement to a total of 60 aircraft by 1981 to meet strategic airlift and refueling needs amid Cold War tensions. Production occurred at McDonnell Douglas's facility in Long Beach, California, from 1979 to 1987, utilizing existing commercial DC-10 assembly lines and components—such as fuselages, wings, and engines—to minimize development risks, reduce costs through economies of scale, and accelerate timelines without significant delays typical of clean-sheet military designs. The first KC-10A was delivered to the in March 1981, with the final aircraft completing production in 1987, enabling rapid integration of civil-derived technology into while maintaining high reliability rates derived from the DC-10's operational history exceeding millions of flight hours by the late 1970s.

Testing and Entry into Service

The prototype McDonnell Douglas KC-10 Extender conducted its maiden flight on July 12, 1980, from the company's facilities in Long Beach, California, marking the start of an extensive flight test program to validate its aerial refueling and cargo capabilities. Following initial handling and performance evaluations, the aircraft completed its first aerial refueling sortie on October 30, 1980, successfully transferring fuel to a C-5 Galaxy transport using the centerline boom system. Subsequent trials encompassed both boom and hose-and-drogue refueling methods, confirming compatibility with a range of receiver aircraft including fighters, bombers, and large transports, while demonstrating the tanker's capacity to offload over 160,000 pounds of fuel in extended missions. U.S. evaluations, including those at test centers like , focused on , structural integrity under refueling loads, and operational reliability during simulated combat profiles. These tests empirically verified the KC-10's dual-role design, with early sorties logging high dispatch rates and minimal discrepancies in fuel transfer efficiency across boom operations at up to 1,100 gallons per minute and drogue systems at lower rates for probe-equipped receivers. Certification milestones were achieved through progressive validation of , , and refueling hardware, paving the way for operational handover. The KC-10 attained Initial Operational Capability in March 1981, with the first aircraft delivered to active-duty units for crew training and mission qualification. Initial integration occurred with air refueling squadrons such as the 9th Air Refueling Squadron at , California, where early test missions confirmed the platform's readiness for strategic airlift and tanker roles, achieving sustained sortie generation rates that exceeded program thresholds for reliability.

Design Features

Airframe and Propulsion

The KC-10 Extender's derives from the McDonnell Douglas DC-10-30CF, a convertible commercial airliner variant, with overall dimensions including a length of 181 feet 7 inches (54.4 meters) and a of 165 feet 5 inches (50.4 meters). The fuselage and wings underwent strengthening to handle military cargo pallets, internal fuel tanks, and enhanced operational stresses beyond civilian standards. These modifications included provisions for a large forward cargo door and reinforced flooring, enabling palletized loads up to 170,000 pounds while maintaining structural integrity under tactical deployments. Propulsion consists of a configuration utilizing three CF6-50C2 high-bypass engines, positioned with two mounted beneath the wings and the third at the base of the . Each engine produces 52,500 pounds (234 kN) of thrust, supporting a of 590,000 pounds (267,600 kg). This powerplant enables a cruise speed of Mach 0.825 (approximately 619 mph at altitude) and an unrefueled ferry range exceeding 11,000 miles, or about 4,400 nautical miles with maximum cargo. The design preserves 88 percent systems commonality with the DC-10 series, allowing use of components for non-mission-specific elements, which streamlines and maintenance in environments compared to bespoke designs lacking such heritage. This approach, validated through decades of USAF operation, demonstrates reduced sustainment burdens via established supply chains and proven reliability under high-cycle usage.

Refueling Capabilities

The KC-10 Extender features a hybrid aerial refueling system incorporating both a rigid flying boom and hose-and-drogue adapters, enabling compatibility with diverse receiver aircraft equipped with either receptacle or probe systems. The boom, operated from a seated station via digital fly-by-wire controls, supports high-volume transfers to large receptacle-equipped receivers such as the B-52 Stratofortress, with a maximum flow rate of 1,100 U.S. gallons (approximately 7,370 pounds) per minute. Fuel is stored across six tanks—primarily in the wings and three large centerline tanks beneath the floor—totaling over 356,000 pounds, nearly double the KC-135 Stratotanker's capacity. This configuration allows the KC-10 to offload substantial quantities, such as up to 200,000 pounds transferable at extended ranges, without requiring the aircraft to jettison , unlike earlier tankers where fuel tanks conflicted with space. The underfloor tanks preserve bay volume, facilitating simultaneous strategic airlift and refueling missions with greater efficiency than the KC-135, as demonstrated in operational evaluations prioritizing throughput under mixed load conditions. For probe-equipped aircraft, including fighters and naval assets, the KC-10 employs a centerline drogue system and, on later models, two wing-mounted air refueling pods (WARP), permitting simultaneous refueling of up to two additional receivers alongside boom operations. Drogue transfer rates reach approximately 470 gallons per minute per hose, supporting rapid servicing of agile platforms like the F/A-18 Hornet. This multi-mode versatility enhances the KC-10's role in extending combat ranges across joint and coalition forces.

Cargo and Strategic Transport

The KC-10 Extender's cargo compartment, derived from the McDonnell Douglas DC-10-30CF convertible freighter design, spans approximately 48 feet in length with a cross-section of 8.5 feet high by 12 feet wide, facilitating the loading of standard 463L pallets, vehicles, and other equipment via a hydraulically operated rear ramp and door assembly. This configuration supports a maximum of 170,000 pounds (76,657 kilograms), enabling the of up to 75 personnel in troop configurations or equivalent cargo loads such as 17 pallets measuring 88 by 108 inches. With a full 170,000-pound load, the achieves an unrefueled range of approximately 4,400 nautical miles (8,149 kilometers), while its ferry range—without payload but utilizing auxiliary fuel tanks—extends to 11,500 nautical miles (21,301 kilometers), supporting long-haul strategic deployments across intercontinental distances. This capability stems from the integration of six internal fuel tanks holding over 356,000 pounds of transferable fuel, which, when not offloaded for refueling missions, sustains extended operations without compromising structural limits. In practice, the KC-10's dual-role design as both tanker and transporter delivered measurable efficiencies during major deployments, such as Operations Desert Shield and Desert Storm in 1990–1991, where it logged 409 to move thousands of tons of and personnel alongside refueling support, thereby consolidating functions and minimizing reliance on dedicated fleets for rapid force projection. The aircraft's versatility reduced operational overhead by allowing seamless transitions between fuel offload and delivery, with documented instances of sustaining high generation rates—averaging multiple daily cycles per —to bolster theater sustainment in austere environments.

Avionics and Upgrades

The KC-10 Extender incorporated military-grade avionics upon entry into service in 1981, including an inertial navigation system that eliminated the requirement for a dedicated navigator position, unlike older tankers such as the KC-135. These systems featured integrated radar for weather avoidance and basic flight management capabilities derived from the DC-10 platform, augmented with secure military communications and director lights for receiver aircraft during refueling operations. The cockpit retained a hybrid analog-digital interface, with the boom operator station utilizing a digital fly-by-wire control system for precise refueling management from a seated position. Modernization efforts began in the late 2000s to address aging avionics and comply with evolving global air traffic management standards, focusing on incremental upgrades rather than full redesigns. In 2009, Boeing proposed enhancements to the communications, navigation, and surveillance/air traffic management (CNS/ATM) suite, enabling GPS-based navigation, traffic collision avoidance system (TCAS) integration, and controller-pilot data link communications (CPDLC) for reduced voice congestion and improved precision. Rockwell Collins secured a $160 million contract in 2011 for cockpit modernization, providing systems integration that included updated flight management systems (FMS), enhanced inertial reference units, and digital displays to support required navigation performance standards. Subsequent upgrades in the extended beyond-line-of-sight operational capabilities through satellite communications (SATCOM) and secure data links, allowing real-time sharing with receiver and ground stations without reliance on line-of-sight relays. By 2015, the U.S. certified its first KC-10 aircrews on these integrated and improvements, which included beyond-line-of-sight data communications to mitigate vulnerabilities in contested environments. Completion of the cockpit upgrade program occurred in 2020, despite delays, yielding empirical reliability gains such as reduced downtime—estimated at 20-30% lower maintenance intervals compared to unmodernized baselines—and justifying costs at approximately $10-15 million per versus procuring new platforms, per RAND cost-effectiveness analyses. These enhancements preserved the fleet's global mobility role through the without compromising core structural integrity.

Variants

KC-10A

The KC-10A served as the primary variant of the Extender tanker for the , adapted from the McDonnell Douglas DC-10-30CF convertible freighter design. McDonnell Douglas constructed 60 KC-10A aircraft specifically for USAF requirements, with deliveries commencing in 1981 and concluding in 1987. These adaptations prioritized and strategic cargo capabilities over the civilian model's passenger-freighter duality, retaining approximately 88% systems commonality while integrating military-specific enhancements. Structural modifications included reinforced lower cargo doors and deck flooring to accommodate heavy palletized loads, replacing unnecessary features with an improved rapid-loading . Most windows were removed to bolster the airframe's strength and minimize weight, alongside the deletion of civilian-specific . A dedicated aft boom operator station was added, positioning the operator in a seated configuration with direct visibility and digital controls for precise refueling operations via a rigid boom. Avionics upgrades encompassed secure , inertial navigation, and integration of refueling systems compatible with both boom and methods, features absent in the DC-10-30CF. The KC-10A fleet, serialized from 79-1944 to 86-0036, featured no major production sub-variants, though individual received post-delivery modifications such as wing-mounted hose pods on 20 units to expand refueling capacity.

KDC-10

The KDC-10 is the limited-production variant of the KC-10 Extender, configured specifically for the Royal Air Force. In 1992, the Dutch Ministry of Defense acquired two second-hand DC-10-30CF airliners from for $98.8 million, including taxes; these were modified into tanker-transport aircraft at a U.S. facility and delivered to the RNLAF in 1995. The conversion retained core structural and propulsion similarities to the KC-10A while incorporating Dutch avionics suites and excluding U.S. classified military systems to meet regulations. For enhanced NATO interoperability, each KDC-10 featured a centerline flying boom compatible with rigid receptacle systems, supplemented by two underwing-mounted hose-and-drogue pods to refuel probe-equipped fighters common among European allies. This dual-capability setup, operated via a remote operator station, enabled the aircraft to support diverse receivers including F-16s and E-3s. Sustainment of the two-aircraft fleet benefited from arrangements with the , sharing logistics for common DC-10-derived systems and peculiar refueling components, which minimized costs and ensured high dispatch reliability in European operations through 2021. No other export customers received this , limiting production to these sole examples.

Operational History

United States Air Force Service

The KC-10A Extender entered United States Air Force service on October 1, 1981, with initial assignment to the 32nd Air Refueling Squadron at what is now Joint Base McGuire-Dix-Lakehurst, New Jersey, under Strategic Air Command. By the mid-1980s, primary basing stabilized at Travis Air Force Base, California (60th Air Mobility Wing, including the 6th and 9th Air Refueling Squadrons), and Joint Base McGuire-Dix-Lakehurst (305th Air Mobility Wing, including the 2nd Air Refueling Squadron), where the fleet supported Air Mobility Command operations after 1992. These units enabled rapid deployment capabilities, with KC-10s providing aerial refueling and strategic airlift for global power projection. Early combat employment occurred during Operation Urgent Fury in in October 1983, marking the KC-10's first operational use for refueling support to invasion forces. In Operations Desert Shield and Desert Storm (1990–1991), KC-10s alongside KC-135s executed approximately 51,700 refueling operations, offloading 125 million gallons of fuel to U.S. and coalition aircraft without a single mission failure. Subsequent missions included post-9/11 homeland defense, with over 350 sorties flown. During Operations Enduring Freedom and Iraqi Freedom (2001–2011), KC-10s completed more than 1,390 missions, delivering essential refueling to joint and coalition receivers in theater, including support for bomber strikes and fighter escorts across the Pacific and tanker bridges. The aircraft routinely extended the range of strategic assets like B-1, B-2, and B-52 bombers, facilitating transcontinental operations without reliance on foreign bases. In the , select KC-10s transitioned to Air Force Reserve support under the 349th Air Mobility Wing at Travis, enhancing surge capacity. The final active-duty KC-10 operations centered at Travis AFB with the 9th Air Refueling Squadron, which conducted the fleet's last mission on September 26, 2024, prior to retirement and transfer to storage at Davis-Monthan AFB, , as KC-46A tankers assumed refueling roles. Throughout service, KC-10s maintained high mission reliability, contributing to uncontested aerial superiority in multiple theaters without Class A mishaps in refueling operations.

Royal Netherlands Air Force Service

The Royal Netherlands Air Force acquired two McDonnell Douglas DC-10-30CF aircraft from the commercial operator Martinair in 1992 and had them converted to KDC-10 tanker-transport configuration in the mid-1990s. These aircraft entered service in 1995 and were assigned to the 334th Transport Squadron at Eindhoven Air Base, where they supported air refueling and strategic transport operations. The KDC-10s contributed to missions, including air refueling support for Dutch F-16 fighters during over in 2011, operating from Elmas Airport in . They also provided aerial refueling and transport for operations in , as well as humanitarian evacuations such as the 2021 withdrawal from Kabul. The squadron maintained high operational availability, pooling up to 2,400 flight hours annually for European Air Transport Command tasks despite the small fleet size. RNLAF crews integrated with U.S. Air Force procedures for training and maintenance, enabling such as refueling U.S. F-22 Raptors during joint exercises. One KDC-10 was retired and transferred to Omega Air Refueling Services in November 2019, while the second conducted its final flight on October 7, 2021, departing for the on October 25, 2021, ahead of replacement by aircraft.

Retirement

United States Retirement Process

The U.S. 's retirement of the KC-10 Extender fleet occurred in phases, with the majority of the 59 aircraft decommissioned between 2022 and 2024 as the service transitioned to the KC-46A tanker. This process aligned with congressional authorization to divest the legacy platform by the end of 2024, enabling reallocation of resources to the expanding KC-46 fleet, which reached 88 delivered aircraft by September 2024. Retiring KC-10s were ferried to the 309th Aerospace Maintenance and Regeneration Group at Davis-Monthan Base, , for long-term storage, where the full fleet of 59 was consolidated by late September 2024. The final operational flight took place on September 26, 2024, involving tail number 79-1948 from , , marking the end of 44 years of service. This aircraft, operated by the 9th Air Refueling Squadron of the , departed following a farewell ceremony that included a formation flight with F-15 fighters to honor the platform's contributions to global mobility operations. Travis AFB, as the last operational base for the KC-10, hosted the event, which emphasized the aircraft's historical significance without disrupting ongoing KC-46 integration. Key drivers of the retirement included escalating sustainment challenges, such as high operating and support costs per flying hour for the aging design, as documented in Government Accountability Office assessments of legacy tanker fleets. These costs stemmed from structural fatigue, corrosion, and the inefficiencies of supporting a relatively small fleet of 59 , which amplified per-unit maintenance burdens compared to larger platforms like the KC-135. Parts scarcity further compounded issues, as the KC-10's production ended decades ago, leading to reliance on diminishing supplier networks and cannibalization practices that reduced rates. In contrast, the KC-46 promised lower lifecycle costs through modern , composite materials, and scalable production, justifying the phase-out despite the KC-10's proven receiver compatibility and cargo versatility.

Netherlands Retirement

The Royal Netherlands Air Force (RNLAF) completed the phase-out of its two KDC-10 aerial refueling and strategic transport aircraft by late 2021, preceding the Air Force's retirement timeline. The first aircraft was retired in November 2019, followed by the second in October 2021, driven by the platforms' extensive operational histories and accumulating structural fatigue from high flight hours. This retirement aligned with NATO strategic priorities, transitioning RNLAF tanker capabilities to the Multinational Multi-Role Tanker Transport (MMF) fleet program, which pools resources among participating nations for enhanced efficiency and interoperability. Under the MMF, the Netherlands secured access equivalent to replacing its two KDC-10s through shared ownership and operation of additional A330 MRTTs, emphasizing collective allied burden-sharing over national solo operations. The final KDC-10, registered T-235 and named Jan Scheffer, performed its last operational mission as a farewell tour over key Dutch sites on October 7, 2021, departing from amid a ceremonial . On October 25, 2021, T-235 ferried out of the , concluding three decades of service that began with the aircraft's conversion and entry into RNLAF inventory in 1995. Post-retirement, at least one ex-RNLAF KDC-10 entered civilian operations with Air Refueling Services, while the fleet's end signified the cessation of the ' autonomous heavy tanker fleet, reliant thereafter on MMF-pooled assets for missions. This move reflected pragmatic adaptations to aging airframes and multinational efficiencies, without documented preservation of airframes for static display in Dutch institutions at the time of phase-out.

Incidents and Accidents

The sole total loss of a KC-10 Extender occurred on September 17, 1987, when USAF KC-10A serial number 82-0190 exploded on the ground at , , approximately one hour after landing from a routine flight. Three members were aboard performing defueling operations when the blast originated in or near the center access compartment between the forward and center wing fuel tanks; one was killed, and two others were injured. The aircraft was destroyed by fire, with the cause attributed to a fuel-related ignition in the compartment, though no definitive mechanical failure was publicly detailed beyond the explosion's proximity to fuel systems. On November 1, 2016, KC-10A serial number 83-0080, assigned to the at , , lost its aerial boom during a training mission over due to a sheared dual rotary voltage crank from bearing misalignment and inadequate maintenance handovers. The boom operator could not maintain control, prompting an in-flight emergency declaration; the crew safely landed at with no injuries, though the detached boom was not recovered intact. An investigation board cited human factors in maintenance and procedural lapses as contributing elements, leading to fleet-wide inspections and procedural updates. In May 2018, a KC-10 Extender at Joint Base McGuire-Dix-Lakehurst, , experienced a ground emergency during which the aircraft's slide-rafts failed to deploy properly, prompting an Air Force-wide safety stand-down and inspections of all 31 remaining KC-10s. A separate incident in June 2018 involved another KC-10 making an at , , where slide-raft inflation issues were again noted during evacuation drills. These events were linked to aging escape systems and led to mandatory replacements across the fleet, with no injuries reported in either case. No fatal accidents or total losses have been recorded for the Royal Netherlands Air Force's KDC-10 variants during their operational service from 1995 to 2021.

Strategic Impact and Evaluation

Key Achievements

The KC-10 Extender enabled unprecedented global power projection for U.S. forces by facilitating long-range, non-stop strike missions. During Operation Desert Storm in 1991, KC-10s supported B-52 Stratofortress bombers launching from , , for round-trip flights exceeding 14,000 miles to Iraqi targets, requiring multiple aerial refuelings as part of the largest refueling operation in history. This capability overcame geographic constraints, allowing strikes without forward basing and demonstrating the tanker's role in extending combat radius through precise fuel delivery. Across its operational career, the KC-10 fleet delivered immense volumes of , underscoring its strategic value in sustained conflicts. In 2009 alone, KC-10s completed over 4,700 sorties while offloading more than 422 million pounds of to receiver worldwide. Over four decades, this cumulative offload reached billions of pounds, supporting operations from Desert Storm to Enduring Freedom and enabling continuous aerial dominance by mitigating the tyranny of distance for fighters, bombers, and transports. The aircraft's hybrid design as a tanker-transport reduced overall demands, permitting simultaneous refueling and missions that accelerated force deployment compared to legacy single-role fleets. Capable of offloading up to 356,000 pounds of while carrying 170,000 pounds of palletized or 75 passengers over 4,400 miles, the KC-10 minimized aircraft requirements and ground support needs. Its 43-year with high rates, affectionately termed "Big Sexy" by crews for unmatched capacity and dependability, affirmed its reliability in high-stakes environments.

Criticisms and Retirement Debates

The KC-10 Extender's configuration contributed to higher operating costs compared to twin-engine alternatives, with expenses elevated due to the complexity of three engines and limited from a fleet of only 59 . Analyses in the highlighted that the small fleet size restricted surge capacity during high-tempo operations, as the limited number of airframes could not readily scale to meet demands for simultaneous refueling and missions without straining availability rates. Aging airframes, with most KC-10s exceeding 30 years of service by the , imposed increasing burdens, including rising costs for structural inspections and component overhauls that outpaced those of newer platforms. Government Accountability Office reports noted that operating and support costs per aircraft escalated due to these age-related factors, prompting debates over whether modernization investments could offset divestment rather than extending service life inefficiently. Retirement decisions faced scrutiny in 2019 amid persistent KC-46 Pegasus delays, particularly boom rigidity issues that impaired refueling of certain receivers like the A-10 Thunderbolt II, leading analysts to argue for retaining KC-10s as a bridge due to their proven boom reliability and multirole versatility. Proponents of extension cited the KC-10's operational maturity over the KC-46's unresolved deficiencies, questioning whether budget-driven divestment risked capability gaps before full replacement certification. However, planners countered that sustaining the KC-10 would exacerbate pilot shortages and per-aircraft costs without addressing long-term inefficiencies.

Comparisons to Other Tankers

The KC-10 Extender surpassed the KC-135 Stratotanker in fuel offload capacity and operational versatility, carrying over 356,000 pounds of transferable fuel—nearly twice the KC-135's approximately 200,000 pounds—while also accommodating up to 170,000 pounds of cargo for dual-role missions. This enabled extended offload ranges, with the KC-10 capable of delivering fuel over intercontinental distances without intermediate basing as frequently required by the smaller KC-135. However, the KC-10's enhanced capabilities incurred higher unit costs, estimated at around $50 million per aircraft in 1980s dollars, compared to the KC-135's lower acquisition and sustainment expenses due to its simpler design and mature production. In contrast to its successor, the KC-46 Pegasus, the KC-10 exhibited advantages in boom refueling precision and multi-receiver operations during early joint exercises and evaluations, as the KC-46 faced initial deficiencies in automated boom controls—categorized as Category II deficiencies—necessitating manual adjustments by operators until software enhancements were implemented. The KC-10's larger fuel reserves (356,000 pounds versus the KC-46's 212,000 pounds) supported greater strategic offloads in high-demand scenarios, though the KC-46 offered improved access to austere fields and defensive systems absent in the older Extender. Relative to the Multi-Role Tanker Transport (MRTT), the KC-10 matched in unrefueled range (approximately 4,400 nautical miles) but excelled in maximum payload at 160 metric tons versus the MRTT's 111 metric tons, prioritizing volume over the MRTT's edge in cruise speed (Mach 0.86 versus the KC-10's Mach 0.82). The KC-10's basis in the airliner allowed for accelerated fielding, with selection in December 1977 leading to operational service by 1981, leveraging existing production lines and shorter requirements that disqualified Boeing's larger 747-based proposal due to excessive complexity, higher burn, and basing limitations.
MetricKC-10 ExtenderKC-135 StratotankerKC-46 PegasusA330 MRTT
Transferable Fuel (lbs)356,000~200,000212,000~245,000 (111 metric tons)
Max Offload Range (nm)~2,500 (with payload)~1,500~2,000~2,500
Cruise Speed (Mach)0.820.800.800.86
Versatility (Cargo lb)170,000Minimal65,00099,000

References

  1. https://www.af.mil/About-Us/Fact-Sheets/Display/Article/104520/kc-10-extender/
  2. https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/3742255/mcdonnell-douglas-kc-10a-extender/
  3. https://www.travis.af.mil/News/Article/768003/travis-celebrates-two-decades-of-kc-10-excellence/
  4. https://www.military.com/equipment/kc-10-extender
  5. https://www.travis.af.mil/News/Article/153288/fueling-the-fight-for-global-reach-the-kc-10-and-kc-135-refuelers/
  6. https://www.af.mil/News/Article-Display/Article/3919933/travis-afb-bids-farewell-to-last-kc-10/
  7. https://www.airandspaceforces.com/air-force-kc-10-tanker-farewell-flight/
  8. https://apps.dtic.mil/sti/tr/pdf/ADA194398.pdf
  9. https://www.globalsecurity.org/military/systems/aircraft/atca.htm
  10. https://www.key.aero/article/kc-10a-extender-usafs-deployment-tanker
  11. https://www.globalsecurity.org/military/systems/aircraft/kc-10-background.htm
  12. https://aeromugs.com/en-ca/blogs/news/the-enduring-legacy-of-the-mcdonnell-douglas-dc-10
  13. https://apps.dtic.mil/sti/pdfs/AD1180712.pdf
  14. https://www.forecastinternational.com/archive/disp_pdf.cfm?DACH_RECNO=1187
  15. https://photorecon.net/the-last-ten-standing/
  16. https://simpleflying.com/mcdonnell-douglas-kc-10-extender-brief-history/
  17. https://www.theaviationzone.com/mcdonnell-douglas-kc-10-extender/
  18. https://simpleflying.com/5-fast-facts-us-air-force-kc-10-extender/
  19. https://www.travis.af.mil/News/Display/Article/3651136/9th-air-refueling-squadron-retires-flagship-kc-10-extender/
  20. https://www.af.mil/News/Features/Display/Article/142764/man-and-machine-airman-shares-30-years-of-service-with-first-kc-10/
  21. https://nuke.fas.org/guide/usa/bomber/kc-10.htm
  22. https://www.globalsecurity.org/military/systems/aircraft/kc-10-specs.htm
  23. https://www.airandspaceforces.com/weapons/kc-10/
  24. https://www.globalsecurity.org/military/systems/aircraft/kc-10.htm
  25. https://www.militaryfactory.com/aircraft/detail.php?aircraft_id=52
  26. https://www.maintainernation.com/the-kc-10a-extender/
  27. https://www.amc.af.mil/News/Features/Display/Article/150143/20-years-after-operations-desert-shield-desert-storm-vets-say-tanker-contributi/
  28. https://www.callsignmagazine.com/articles/kc-10-extender
  29. https://boeing.mediaroom.com/2009-07-28-Boeing-Submits-Proposal-for-US-Air-Force-KC-10-Cockpit-Upgrades
  30. https://www.airforce-technology.com/projects/kctankeraircraft/
  31. https://www.rand.org/content/dam/rand/pubs/technical_reports/2011/RAND_TR901.pdf
  32. https://www.travis.af.mil/News/Article/767910/9th-ars-certifies-first-travis-aircrew-on-upgrades/
  33. https://l2aviation.com/l2-aviation-completes-air-force-cockpit-upgrade/
  34. https://photorecon.net/farewell-to-the-usafs-kc-10-extender/
  35. https://avgeekery.com/that-other-air-force-tanker-the-flexible-capable-kc-10a-extender/
  36. http://www.taxiways.de/DC-10//D10operator/RNAF.html
  37. https://www.key.aero/article/dutch-defence-ministry-acquires-four-aircraft-types
  38. https://sam.gov/opp/8622eec44b49b7025d39f5bcb7783786/view
  39. https://www.amc.af.mil/News/Article-Display/Article/3014847/amc-museum-receives-usafs-first-kc-10a-extender/
  40. https://www.travis.af.mil/Units/Fact-Sheets/Article/1207787/kc-10-extender/
  41. https://www.af.mil/News/Article-Display/Article/114368/kc-10-marks-20-years-of-deployment-nearly-30-years-of-operations/
  42. https://themobilityforum.net/2025/05/13/kc-10-the-planes-legendary-place-in-history/
  43. https://www.amc.af.mil/News/Article-Display/Article/3919791/travis-afb-bids-farewell-to-last-kc-10/
  44. https://www.349amw.afrc.af.mil/News/Article-Display/Article/3348650/check-wheels-down-one-last-time/
  45. https://www.key.aero/article/rnlafs-final-kdc-10-tanker-leaves-netherlands
  46. https://www.aerotime.aero/articles/29098-netherlands-retires-kdc-10-tanker
  47. https://english.defensie.nl/topics/historical-missions/mission-overview/2011/operation-unified-protector-in-libya/dutch-contribution
  48. https://eatc-mil.com/post/kdc-10-time-to-say-goodbye
  49. https://www.key.aero/article/going-tactical
  50. https://www.omegaairrefueling.com/omega-air-takes-delivery-of-royal-netherlands-air-force-kdc-10/
  51. https://www.key.aero/article/end-road-kc-10-extender
  52. https://www.airforce-technology.com/news/us-air-force-retires-kc-10-extender-fleet-after-44-years-of-service/
  53. https://www.twz.com/air/final-kc-10-extender-tanker-sent-into-retirement
  54. https://www.travis.af.mil/News/Display/Article/3919629/travis-afb-bids-farewell-to-last-kc-10/
  55. https://theaviationgeekclub.com/usaf-bids-farewell-to-the-kc-10-extender/
  56. https://www.gao.gov/assets/gao-23-106217.pdf
  57. https://www.gao.gov/assets/gao-22-104530.pdf
  58. https://www.facebook.com/USTRANSCOM/posts/the-end-of-an-erasince-its-first-flight-in-1980-the-kc-10-extender-has-kept-the-/932370398921334/
  59. https://www.japcc.org/articles/the-multinational-multi-role-tanker-transport-fleet-programme/
  60. https://aviationweek.com/defense/program-dossier-a330-multi-role-tanker-transport-mrtt
  61. https://www.vayuaerospace.in/article.aspx?d=708&n=farewell-flight-of-mcdonnel-douglas-kdc-10
  62. https://www.facebook.com/keithjonesairshowvideos/posts/the-last-of-the-legendary-kc-10-tanker/1222874609800492/
  63. https://simpleflying.com/kc-extenders-still-fly-us-military-after-usaf-retirement/
  64. https://asn.flightsafety.org/wikibase/326693
  65. https://www.baaa-acro.com/aircraft/douglas-kc-10-extender
  66. https://www.amc.af.mil/News/Article-Display/Article/1252217/report-details-cause-of-travis-kc-10-refueling-boom-mishap/
  67. https://www.airandspaceforces.com/report-finds-broken-control-unit-caused-kc-10s-boom-to-detach-in-flight/
  68. https://aerossurance.com/safety-management/kc10-boom-mx-error-hf/
  69. https://www.military.com/dodbuzz/2018/08/24/all-kc-10-extender-refueling-aircraft-affected-slide-raft-issue-air-force.html
  70. https://www.airforcetimes.com/news/your-air-force/2018/06/25/heres-why-the-air-force-is-investigating-the-kc-10/
  71. https://www.flightglobal.com/dutch-air-force-scraps-dc-10-transport/113013.article
  72. https://www.dvidshub.net/news/63811/kc-10-marks-20-years-deployment-nearly-30-years-operations
  73. https://militaryaircraft.quora.com/Why-is-the-KC-10-being-retired-when-it-is-much-newer-than-the-KC-135
  74. http://warontherocks.com/2019/10/the-case-for-a-three-tanker-air-force/
  75. https://apps.dtic.mil/sti/trecms/pdf/AD1106532.pdf
  76. https://www.gao.gov/assets/gao-21-101sp.pdf
  77. https://www.rand.org/content/dam/rand/pubs/monographs/2009/RAND_MG901.pdf
  78. https://www.airforcetimes.com/news/your-air-force/2022/11/14/kc-46-tankers-boom-issue-will-prevent-a-10-refueling-for-years/
  79. https://www.military.com/defensetech/2018/03/23/will-ongoing-kc-46-tanker-problems-affect-kc-10-retirement.html
  80. https://www.airmanmagazine.af.mil/Features/Display/Article/2597503/airframe-the-kc-135-stratotanker/
  81. https://www.airandspaceforces.com/article/pegasus-power/
  82. https://www.airforce-technology.com/features/featurethe-worlds-best-aerial-refuelling-aircraft/
  83. https://avgeekery.com/kc-747-the-too-big-tanker/
  84. https://simpleflying.com/top-tanker-aircraft-list/
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